Derrick



J. L. BARNES.

- DERRICK.

APPLICATION men Aue.24. 1921.

Patented Sept. 5, 1922.

A TTORNE Y Patented Sept. 5, 1922.

JOHN L. BARNES, 0F WHIGVILLE, OHIO.

DERRICK.

Application filed August 24, 1921. Serial No. 494,796.

To all whom it may concern:

Be it known that I, JOHN L. BARNES, a citizen of the United States, residing in the city of W higville, county of Noble, and State of Ohio, have invented new anduseful Improvements in Derricks, of which the following is a specification, reference being had to the accompanying drawings.

This invention is a swivel derrick, designed for elevating and shifting loads, and it is especially convenient for use as a hay stacker in stacking hay from wagons. It may likewise be employed for any similar purpose. The object of the invention is to provide a relatively simple and practical device for the aforesaid uses.

In the drawings:

Figure l is a side elevation.

Figure 2 is a top view.

Figure 3 is a detail of the pivoted seg 'ment at the upper end of the inclined track,

showing how same may be turned aside to accommodate the lowered mast.

The invention comprises a ground frame 1, which is preferably sled like in character, to

facilitate dragging the derrick from point to point in the same field or locality. Medially in this frame is journaled a cross bar 2 at the points 3, and a mast 4 is pivotally mounted through a hole 5 cut transversely through the cross bar. The mast 4 is thus adapted to rotate laterally in the cross bar 2, or to be raised into a vertical position or lowered to a horizontal position by virtue of the journaled ends of the cross bar. Of course all the bearings may be made ball bearings if desired in order to effectuate the smooth operation of the device. A pulley 6 is rigidly mounted on the lower end of the mast 4, and an arm 7 is hinged at 8 near the upper end of said mast. An adjustable brace 9 with notches 10 is hinged at 11 to the outer end of the arm 7, while the notched end is adapted to engage a pin 12 set in a slot 13 cut in the tip of the mast 4. By this means the arm 7 may be raised or lowered.

An inclined track 14 in the form of a half circle, embraces the base of the mast 4, said inclined track being mounted upon brackets 20 extended from the frame 1. Braces 15 are extended from the base of the mast 4 out over the track 14, and a roller 16 is ournaled at the end of these braces to travel upon said track 14. The journal 17 ofthe lower end of the mast 4, which passes through the hole 5 is sufliciently long to allow the mast to rise vertically as the roller 16 travels from the lower to the higher most point on the,

track 14. The purpose of the inclined track 14 is to facilitate the returntravel of the roller 16 to the lowermost or opposite end of the track after each trip of the arm 7 in I carrying a load, the arm of course following. the roller. The upper end of the track 14 is a separate segment 18 pivoted-at 19 to the i I 4 main segment, so that it may be turned aside as shown in Flgure 3, to enable the mast 4 to be lowered to a horizontal position on the frame 1, in moving the' apparatus about.

Any usual 'system of' pulleys 21 and cable 22 may be mounted upon the arm 7 for hoisting the loads, and a cable 23 is attached to the pulleyfi for turning the mast 4, arm 7 and load depending therefrom. The mast 4 is supported by braces 24 hooked to the frame 1 and extended to a sleeve 25 encircling the mast'4. These braces maybe unhooked for lowering the mast. The op-- eration of the device is apparent from the foregoing description.

While I have herein described a certain specific method of constructing and assembling the elements of my invention, it is un dcrstood same may be varied in minor details, not departing from the spirit of my invention as defined in the appended claims.

I claim: 1. A swivel derrick, comprising a sledlike ground frame; a mast so mounted on the frame as to adapt it for rotative movement and to be lowered horizontally on the circular track on the ground frame, about the base of the mast; a roller braced from the base of the mast and adapted to'travel upon said track; cable and pulley tackle on the arm of the mast for raising loads; and a cab-1e attached to the pulley at the lower end of the mast for rotating said mast.

2. A swivel derrick, comprising a ground frame; a mast supported on the frame and adapted to rotate and to be raised vertically or lowered horizontally as desired; an adjustable arm at the upper end of the mast; a semi-circular track at the base of the mast; a roller traveling said track and connected With said mast; pulley and cable tackle arranged on the mast arm; and means for rotating the mast laterally.

JOHN L. BARNES. Witnesses:

l V. J. LAHUE, MAGGIE MOVAY. 

